Specification Brand : UniTak3D BulletPoint1 : 【Anti-rust Coating Surface】: Linear Guide Rail adpots blackening treatment on surface to prevent rusting in long-term use. BulletPoint2 : 【Upgrade 3D Printer】: The 350mm MGN12 Linear Rail will upgrade your 3D printer,which can improve print quality and carrying capacity greatly. BulletPoint3 : 【Premium Material】:The linear bearing is made of heavy-duty bearing steel,which is more durability, high stiffness stiffness,high accuracy,smooth running, low noise than others. BulletPoint4 : 【Application】This linear motion rail widely use in Ender 3 series/CR10 series 3D printers, large-scale transmission equipments including industrial robots, cleaning equipment and supporting devices, etc. BulletPoint5 : 【Drop Proof Rubber】:There are 2 black rubber stoppers on the ends of the linear sliding guideway in case the carriage falls off the rail. ExternallyAssignedProductIdentifier1 : 0605175678933 ExternallyAssignedProductIdentifier2 : 605175678933 FinishType : Polished ItemName : UniTak3D MGN12 350mm Linear Guide Rail with MGN12H Bearing Steel Carriage Block X-axis Upgrade Kit for Ender 3 CoryXY DIY 3D Printer and CNC Machines ItemPackageDimensions_Height : 42.1 centimeters ItemPackageDimensions_Length : 2.7 centimeters ItemPackageDimensions_Width : 4.2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : linear-motion-guides Manufacturer : UniTak3D Material : bearing steel ModelNumber : VC-LMR8 NumberOfItems : 1 PartNumber : Uni090UK ProductDescription : Specification: Color:Black; Material: Bearing Steel; Type: Slide guide rail; Slide track: Linear guide rail; Accuracy level: H ; Length(Optional):Approx. 350mm/13.8inch; Installation screw size(not included): M6(Rail), M3(Block) ; Weight: 217~335g(approx); MGN12H:Basic dynamic load rating:380 C[kgf] Basic static load rating:600C[kgf]